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- PDB-6bc2: Cryo X-ray structure of acetylsisomicin bound AAC-VIa -

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Basic information

Entry
Database: PDB / ID: 6bc2
TitleCryo X-ray structure of acetylsisomicin bound AAC-VIa
ComponentsAAC 3-VI protein
KeywordsTRANSFERASE/ANTIBIOTIC / acetyltransferase / TRANSFERASE-ANTIBIOTIC complex
Function / homologyaminoglycoside 3-N-acetyltransferase / aminoglycoside 3-N-acetyltransferase activity / Aminoglycoside N(3)-acetyltransferase / Aminoglycoside 3-N-acetyltransferase / Aminoglycoside 3-N-acetyltransferase-like / response to antibiotic / metal ion binding / acetylsisomicin / Aminoglycoside N(3)-acetyltransferase
Function and homology information
Biological speciesEnterobacter cloacae (bacteria)
MethodX-RAY DIFFRACTION / Resolution: 2.195 Å
AuthorsCuneo, M.J. / Kumar, P. / Serpersu, E.H.
CitationJournal: Sci Adv / Year: 2018
Title: A low-barrier hydrogen bond mediates antibiotic resistance in a noncanonical catalytic triad.
Authors: Kumar, P. / Serpersu, E.H. / Cuneo, M.J.
History
DepositionOct 20, 2017Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 28, 2018Provider: repository / Type: Initial release
Revision 1.1Sep 12, 2018Group: Data collection / Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Oct 4, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / pdbx_struct_conn_angle / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_symmetry / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_symmetry / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_symmetry

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: AAC 3-VI protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)32,8583
Polymers32,3441
Non-polymers5142
Water1,17165
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: equilibrium centrifugation
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area90 Å2
ΔGint-5 kcal/mol
Surface area12030 Å2
Unit cell
Length a, b, c (Å)84.409, 86.866, 50.313
Angle α, β, γ (deg.)90.00, 119.82, 90.00
Int Tables number5
Space group name H-MC121
Components on special symmetry positions
IDModelComponents
11A-302-

MG

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Components

#1: Protein AAC 3-VI protein / AAC-VIa


Mass: 32344.461 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Enterobacter cloacae (bacteria) / Gene: aac 3-VI / Production host: Escherichia coli (E. coli) / References: UniProt: Q47030
#2: Chemical ChemComp-DVM / acetylsisomicin / N-[(1S,2R,3R,4S,5R)-5-amino-2-{[(2S,3R)-3-amino-6-(aminomethyl)-3,4-dihydro-2H-pyran-2-yl]oxy}-4-{[3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranosyl]oxy}-3-hydroxycyclohexyl]acetamide


Mass: 489.563 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C21H39N5O8
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#4: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 65 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.47 Å3/Da / Density % sol: 50.28 %
Crystal growTemperature: 285 K / Method: vapor diffusion, hanging drop / pH: 8
Details: 0.1 M Tris, pH 8.5, 0.3 M magnesium chloride, 15-20% PEG8000

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU MICROMAX-007 HF / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV++ / Detector: IMAGE PLATE / Date: May 14, 2017
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.195→30 Å / Num. obs: 14753 / % possible obs: 91.8 % / Redundancy: 3 % / Biso Wilson estimate: 38.78 Å2 / Rmerge(I) obs: 0.094 / Χ2: 1.646 / Net I/σ(I): 16
Reflection shell
Resolution (Å)Redundancy (%)Rmerge(I) obsNum. unique obsΧ2Diffraction-ID% possible all
2.2-2.282.60.55415723.218197.3
2.28-2.372.80.45715811.531199.3
2.37-2.4830.33415881.63199.9
2.48-2.6130.25215761.543199.1
2.61-2.773.10.19216001.643198.5
2.77-2.993.10.15315181.575196.6
2.99-3.293.10.11114981.455193.2
3.29-3.762.90.09513181.628181
3.76-4.732.90.06511241.215169.8
4.73-3030.0513781.103183.9

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Processing

Software
NameVersionClassification
PHENIX(1.11_2567: ???)refinement
HKL-2000data scaling
PDB_EXTRACT3.22data extraction
HKL-3000data reduction
PHASERphasing
RefinementStarting model: PDB entry 6BC6
Resolution: 2.195→29.425 Å / SU ML: 0.43 / Cross valid method: FREE R-VALUE / σ(F): 1.33 / Phase error: 39.38 / Stereochemistry target values: ML
RfactorNum. reflection% reflection
Rfree0.3076 737 5 %
Rwork0.2819 --
obs0.283 14737 91.21 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Refinement stepCycle: LAST / Resolution: 2.195→29.425 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2028 0 35 65 2128
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0052122
X-RAY DIFFRACTIONf_angle_d0.942903
X-RAY DIFFRACTIONf_dihedral_angle_d20.665753
X-RAY DIFFRACTIONf_chiral_restr0.053318
X-RAY DIFFRACTIONf_plane_restr0.006380
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
2.1949-2.36430.46991520.41392905X-RAY DIFFRACTION95
2.3643-2.60210.35981600.32333026X-RAY DIFFRACTION100
2.6021-2.97830.32621580.31472996X-RAY DIFFRACTION98
2.9783-3.75110.30451410.29132683X-RAY DIFFRACTION87
3.7511-29.42810.25411260.22692390X-RAY DIFFRACTION77

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